WEBBER GAGE BLOCKS. Precision, Quality, Innovation. Band Saw Blades. Force Measurement. Jobsite & Workshop Tools.

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1 Precision, Quality, Innovation WEBBER GAGE BLOCKS Band Saw Blades Force Measurement Jobsite & Workshop Tools Laser Measurement Metrology Equipment Precision Granite Precision Ground Solutions Precision Measuring Tools PTA & Hand Tools Service Webber Gage Blocks

2 Precision Gage Blocks, Standard Reference Bars Gage Blocks Major Product Characteristics Precision gage blocks are the primary standards vital to dimensional quality control in the manufacture of parts. The four major characteristics that are necessary for a precision gage block are accuracy, surface finish, wear resistance and dimensional stability. Other factors are corrosion resistance, hardness, thermal conductivity and coefficient of expansion. The base material used for gage blocks is crucial in meeting the above criteria. While many materials have been tried, the major types available today are: Traditional high-grade steel gage blocks, which are generally used in shop floor environments Tungsten Carbide gage blocks, which have the advantage of being harder and longer wearing than steel (Not available from Starrett-Webber) Ceramic gage blocks will outwear regular steel and will not corrode Chromium Carbide gage blocks are considered the top of the line; the finest available. They outwear regular steel and ceramic. In addition, they will not corrode, are very stable and accurate, and have exceptional "wringing" qualities. croblox Chromium Carbide is the superior gage block material. The reason that our Webber Gage Division emphasizes gage blocks made from Chromium Carbide is because they are the most stable measuring devices ever developed. No one in the world except Starrett-Webber has produced the accuracy and stability of our croblox Grand Masters. They were produced in 955 of Chromium Carbide material to an accuracy within one millionth of an inch ( mm) and have been checked periodically by the U.S. National Bureau of Standards and the U.S. National Institute of Standards and Technology (NIST) and have remained stable over this period. Other Characteristics Accuracy All Starrett-Webber gage blocks meet or exceed all known specifications. The flatness, parallelism and surface finish necessary to achieve the required accuracies are the same as or better than government requirements. Stability Starrett-Webber gage blocks do not change in size except through normal wear. Gage block stability is a characteristic that our Webber Gage Division has mastered with over eighty years of experience. Our gage blocks withstand the test of time. Hardness Steel blocks have a Rockwell "C" hardness of approximately Chromium Carbide blocks have a Rockwell "C" hardness of 7-73, with an unusually fine, hard grain structure, giving them exceptional resistance to wear and abrasion. Thermal Conductivity and Coefficient of Expansion These are not important considerations when measurements are taken in temperature-controlled environments. This is primarily done when measuring to microinches or microns. On the shop floor, where precision measurements are rarely finer than.000" or 0.005mm, the coefficient of expansion of steel, chromium carbide and ceramic is so close as to be negligible. Thermal conductivity is important on the shop floor. However, because it takes time for a gage block to move to the same temperature as the workpiece, we recommend setting the gage block on a heat sink such as a large mass of metal that is at the shop environment temperature. 378

3 How To Order Starrett Precision Gage Blocks Gage Block Sets. Order by catalog number.. Please specify if you require a Commercial Calibration or Master Calibration. See the catalog page regarding our Accredited Gage Block Calibration Service near the end of this section. A certificate of calibration provides individual readings on each block and provides traceability to NIST. Webber gage block calibrations are NVLAP accredited by NIST. (We require the end user's name and address to place on the certificate.) 3. Specify if you require special etched serial numbers. We can provide numbers up to a 6-digit maximum. (Our standard practice is to put the same etch number on each block in a set. Blocks are differentiated by their marked size.) If an etched serial number is not specified, we will assign a number that is a coded date. The buyer of Webber products listed in this catalog agrees to the 00% Relaxed Acceptance Rule contained in ASME B (Guidelines for Decision Rules: Considering Measurement Uncertainty in Determining Conformance to Specifications). Products may not be rejected by the purchaser unless his measurements exceed the published tolerances by more than his uncertainty of measurement. NVLAP accreditation does not constitute an endorsement of any product by NVLAP or any agency of the U.S. government. NVLAP LAB CODE National Institute of Standards and Technology National Voluntary Laboratory Accreditation Program Starrett-Webber Gage Division 4500 Detroit Road Cleveland, OH 4445 Phone: Fax: sales@starrett-webber.com DIMENSIONAL NVLAP Code: 0/DO3 Gage Blocks Individual Gage Blocks. Specify Shape, signified by the following symbols: Rectangular Square Heavy Duty. Specify Material (croblox, steel, or ceramic) 3. Specify Unit of Measure (inch or metric) 4. Specify the Size 5. Specify Special Lengths, if applicable (Rectangular Only) Thin block sets (8 pc. inch and 7 pc. metric) are all.5" (8.3mm) long. Specify "SS" length..050",.00", and.50" blocks in inch 8-9 pc. sets are.380" long. Specify the Long length, "L"..00" blocks contained in the 36, 38, and 43 pc. sets are.380" long. Specify the Long length, "L". 6. Specify Accuracy Grade (see next page) 7. Specify if you require a Commercial, Master or Laboratory Calibration*. See the catalog page regarding our Accredited Gage Block Calibration Service near the end of this section. A certificate of calibration provides individual readings on each block and provides traceability to NIST. Webber gage block calibrations are NVLAP accredited by NIST. (We require the end user's name and address to place on the certificate.) * Commercial calibrations are included in the price of gage blocks. Master calibrations are done at extra cost. Laboratory calibrations are done at extra cost and are restricted to Webber croblox rectangular style gage blocks of grades LM, AA, GGG grades 0.5 and, and B89 Grades 00 and K. 8. Specify if you require special etched serial numbers. We can provide up to a 6-digit maximum. If an etched serial number is not specified, we will assign a number that is a coded date. Check out our website for interactive features at starrett.com 379

4 Gage Block s Gage Block s: B89..9 Inch System: s expressed in microinches (.00000") millionth of an inch Order Webber Grade LM Order Webber Grade AA B89..9 Grade 00 Order Webber Grade A B89..9 Grade 0 Size Variation in Length Flatness Size Variation in Length Flatness Size Variation in Length Thru.050" +./ /-4 +6/ Thru.400" +./ /-3 +5/ Thru " +./ /-3 +6/ Thru " +.0/ /-4 +8/ Thru 3" +3.0/ /-5 3 Rect.:, Sq.: 3 +0/ Thru 4" +4.0/ /-6 3 Rect.:, Sq.: 3 +/- 5 4 Thru 5" +8/-8 3 Rect.:, Sq.: 3 +6/ Thru 6" +8/-8 3 Rect.:, Sq.: 3 +6/ Thru 7" +0/ / Thru 8" +0/ / Thru 0" +/ / Thru " +4/ / Thru 6" +8/ / Thru 8" +0/ / Flatness Not Available from Webber B89..9 Grade AS Size Variation in Length Flatness Not Available from Webber B89..9 Grade AS Size Variation in Length Thru.050" +/ /-4 0 Thru.400" +8/ /-8 0 Thru " +/ /-4 0 Thru " +6/ /-3 0 Thru 3" +0/ / Thru 4" +4/ / Thru 5" +3/ / Thru 6" +3/ / Thru 7" +40/ / Thru 8" +40/ / Thru 0" +48/ / Thru " +56/ /- 0 0 Thru 6" +7/ / Thru 0" +88/ / B89..9 Grade 00 exceeds DIN, ISO, BS Grades K Material Coefficients of Thermal Expansion are: Chromium Carbide 4.7 x 0-6 inch/ºf per inch SAE 500 Steel 6.4 x 0-6 inch/ºf per inch Ceramic 5.5 x 0-6 inch/ºf per inch Flatness Suggested Replacement Grades for GGG-G-5C GGG-G-5C Grade Webber Grade B89..9 Grade 0.5 LM AA 00 A 0 3 A AS The above replacement grades are suggested in B However, the tolerances specified in GGG- G-5C and B89..9 are not exactly the same. Gage blocks meeting B89..9 specifications may not meet GGG-G-5C requirements and vice versa. 380

5 Metric System: s expressed in micrometers (0.00mm) Order Webber Grade LM Order Webber Grade AA B89..9 Grade 00 Order Webber Grade A B89..9 Grade 0 Size Variation in Length Flatness Size Variation in Length Flatness Size Variation in Length Thru 0.5mm +.03/ / / Thru 0mm +.03/ / / Thru 5mm +.04/ / / Thru 50mm +.05/ / / Thru 75mm +.08/ /-..07 Rect (.05), Sq. (.07) +.5/ Thru 00mm +.0/ / Rect (.05), Sq. (.07) +.30/ Thru 5mm +.0/ Rect (.05), Sq. (.07) +.40/ Thru 50mm +.0/ Rect (.05), Sq. (.07) +.40/ Thru 75mm +.5/ / Thru 00mm +.5/ / Thru 50mm +.30/ / Thru 300mm +.35/ / Thru 400mm +.45/ / Thru 500mm +.50/ / Flatness Not Available from Webber B89..9 Grade AS Size Variation in Length Flatness Not Available from Webber B89..9 Grade AS Size Variation in Length Thru 0.5mm +.30/ / Thru 0mm +.0/ / Thru 5mm +.30/ / Thru 50mm +.40/ / Thru 75mm +.50/ / Thru 00mm +.60/ / Thru 5mm +.80/ / Thru 50mm +.80/ / Thru 75mm +.0/ / Thru 00mm +.0/ / Thru 50mm +./ / Thru 300mm +.4/ / Thru 400mm +.8/ / Thru 500mm +./ / B89..9 Grade 00 exceeds DIN, ISO, BS Grades K Material Coefficients of Thermal Expansion are: Chromium Carbide 8.5 x 0-6 m/ºc per m SAE 500 Steel.5 x 0-6 m/ºc per m Ceramic 9.9 x 0-6 m/ºc per m Flatness Suggested Replacement Grades for GGG-G-5C GGG-G-5C Grade Webber Grade B89..9 Grade 0.5 LM AA 00 A 0 3 A AS The above replacement grades are suggested in B However, the tolerances specified in GGG- G-5C and B89..9 are not exactly the same. Gage blocks meeting B89..9 specifications may not meet GGG-G-5C requirements and vice versa. Check out our website for interactive features at starrett.com 38

6 Gage Block Sets Rectangular Inch System Gage Block Sets, Individual Blocks and Accessories All sets are furnished in a handsome, rugged wood case for lasting protection INCH Rectangular croblox Gage Block Sets in Case Accuracy Grade* Measuring Range Blocks Per Set Blocks Included In Sets Cat. No. B B in Steps of in Steps of.000 Webber LM B in Steps of.00 B in Steps of in Steps of Webber LM / in Steps of /64 B B Webber LM in Steps of in Steps of.000 B in Steps of in Steps of.000 B in Steps of Blocks.00 Through.009 (Steps of.000) 49 Blocks.0 Through.49 (Steps of.00) 9 Blocks.050 Through.950 (Steps of.050) 4 Blocks.000 Through (Steps of ") Same as in RC 8. Set, Plus 3 Blocks.0005,.0005, Blocks /6, 5/64, 3/3, 7/64 9 Blocks.00 Through.009 (Steps of.000) 9 Blocks.0 Through.09 (Steps of.00) 9 Blocks.0 Through.90 (Steps of.00) 3 Blocks.00 Through.300 (Steps of.00) Block Blocks.000,.000 and Block Blocks.00 Through.009 (Steps of.000) 9 Blocks.0 Through.09 (Steps of.00) 9 Blocks.00 Through.090 (Steps of.00) RC 8.A RC 8.AA RC 8.LM** RC 88.A RC 88.AA RC 88.LM** RC 34.A RC 34.AA RC 34.LM** RC 8.A RC 8.AA For gage block accessories, order AC.A Accessory Set in Case. Sets include etched serial numbers and Commercial Calibration Certificate. A Master Calibration Certificate is available at extra cost. * For complete accuracy specifications, see the beginning of this section. ** Available by special order only. 38

7 Gage Block Sets Rectangular Inch System Gage Block Sets, Individual Blocks and Accessories Our Ceramic Gage Blocks, offered in rectangular, inch and metric, fill the gap between steel and the universally accepted croblox. While not as stable as croblox, ceramic is an excellent alternative to steel because of its superior hardness, thermal expansion and wear characteristics. Rectangular Ceramic Gage Block Sets in Case Accuracy Grade* Measuring Range Blocks Per Set Blocks Included In Sets Cat. No. B B B B B B in Steps of in Steps of in Steps of in Steps of in Steps of / in Steps of / in Steps of in Steps of.000 Sets include etched serial number and Commercial Calibration Certificate. A Master Calibration Certificate is available at extra cost. * For complete accuracy specifications, see the beginning of this section Blocks.00 Through.009 (Steps of.000) 49 Blocks.0 Through.49 (Steps of.00) 9 Blocks.050 Through.950 (Steps of.050) 4 Blocks.000 Through (Steps of ") Same as in RY 8. Set, Plus 3 Blocks.0005,.0005, Blocks /6, 5/64, 3/3, 7/64 9 Blocks.00 Through.009 (Steps of.000) 9 Blocks.0 Through.09 (Steps of.00) 9 Blocks.0 Through.90 (Steps of.00) 3 Blocks.00 Through.300 (Steps of.00) Block Blocks.000,.000 and INCH RY 8.A RY 8.AA RY 88.A RY 88.AA RY 34.A RY 34.AA INCH Rectangular Steel Gage Block Sets in Case B89..9 Accuracy Grade 0* Measuring Range Blocks Per Set Blocks Included In Sets Cat. No in Steps of in Steps of in Steps of in Steps of in Steps of / in Steps of / in Steps of in Steps of in Steps of / in Steps of / in Steps of in Steps of in Steps of in Steps of in Steps of in Steps of in Steps of in Steps of in Steps of in Steps of.00 Micrometer Checking Set Blocks.00 Through.009 (Steps of.000) 49 Blocks.0 Through.49 (Steps of.00) 9 Blocks.050 Through.950 (Steps of.050) 4 Blocks.000 Through (Steps of ") Same as in RS 8.A Set, Plus 3 Blocks.0005,.0005, Blocks /6, 5/64, 3/3, 7/64 Same as in RS 88.A Set, Plus Blocks.00" (croblox Wear Blocks) Blocks.050 (croblox Wear Blocks) Blocks.050 (croblox Wear Blocks) Block Blocks.050 Through.0509 (Steps of.000) 9 Blocks.05 Through.059 (Steps of.00) Blocks.050 Through.50 (Steps of.00) 4 Blocks.00 Through.500 (Steps of.00) Blocks.000 and Blocks.00 Through.009 (Steps of.000) 9 Blocks.0 Through.09 (Steps of.00) 9 Blocks.0 Through.90 (Steps of.00) 4 Blocks.00,.00,.300, Blocks.000,.000, Block Blocks.00 Through.009 (Steps of.000) 9 Blocks.0 Through.09 (Steps of.00) 9 Blocks.00 Through.090 (Steps of.00) RS 8.A RS 88.A RS 9.A RS 38.A RS 34.A RS 8.A 9 Block.065,.00,.5,.00,.50,.300,.500,.000,.000 RS 9.A B89..9 Accuracy Grade AS* 0 0 blocks.05,.0,.35,.40,.500,.605,.70,.85,.90,.000 RS 0.A For gage block accessories, order AC.A Accessory Set in Case. See rectangular block accessories on the next page. Sets include etched serial numbers and Commercial Calibration Certificate. A Master Calibration Certificate is available at extra cost. * For complete accuracy specifications, see the beginning of this section. Check out our website for interactive features at starrett.com 383

8 Gage Block Sets MicroAccurate B-Grade Rectangular Steel Gage Block Sets in Case These B-Grade gage block sets are Starrett Global products. Their very affordable price makes them ideal for general shop floor use. Etched, unique serial numbers are included on each block. Custom numbers are not available. Sets available with a choice of two types of certificates of calibration as described below Inch System sets have a tolerance of ±50µin. Metric System sets have a tolerance of ±.5µm. RS 8.B INCH AND METRIC MicroAccurate Inch System Sets Measuring Range Blocks Per Set Blocks Included In Sets Cat. No in Steps of in Steps of.000 MicroAccurate Metric System Sets 3.0 Through 450 in.0005 Steps.0 Through 450 in.00 Steps.0 Through 450 in.0 Steps.0 Through 450 in. Steps MicroAccurate Metric System Sets 3.0 Through 50 in.0005 Steps.0 Through 50 in.00 Steps.0 Through 50 in.0 Steps.0 Through 50 in. Steps Blocks.00 Through.009 (Steps of.000) 49 Blocks.0 Through.49 (Steps of.00) 9 Blocks.050 Through.950 (Steps of.050) 4 Blocks.000 Through (Steps of ) block.5 block blocks.00 Through.009 (Steps of.00) 49 blocks.0 Through.49mm (Steps of.0) 8 blocks Through 9.5 (Steps of.5) 0 blocks 0 Through 00 (Steps of 0) block.5 block blocks.00 Through.009 (Steps of.00) 49 blocks.0 Through.49 (Steps of.0) 48 blocks Through 4.5 (Steps of.5) 4 blocks 5 Through 00 (Steps of 5) RS 8.B RS 8.W RS 88.MB RS 88.MW RS.MB RS.MW Specifications Cat. No. RS 8.B RS 88.MB RS.MB RS 8.W RS 88.MW RS.MW Features Calibration performed at Webber Gage in Cleveland, OH. Certificate of Calibration with NVLAP accreditation. Calibration in accordance with ISO 705 with dated calibration certificate and NIST traceability number. The name and address of the user may be added to the calibration certificate. Inch System (RS 8.B) uncertainty of measurement (k=): U = 6 + L where L is in inches, but U not less than 7 min. Metric Systems (RS 88.MB & RS.MB) uncertainty of measurement (k=): U = L where L is in millimeters, but U not less than 0.8 μm. Calibration performed in China in partnership with Webber Gage. Webber Gage samples the measurements to monitor the calibration results. Calibrations are traceable to NIST, but no NIST traceability number or dates will be given. The name and addrress of the user will be left blank on the calibration certificate. Inch System (RS 8.W) uncertainty of measurement (k=): 0 µin. Metric Systems (RS 88.MW & RS.MW) uncertainty of measurement (k=): U = 0.5 µm. 384

9 Gage Block Accessories Rectangular croblox Wear Blocks Size Cat. No..00 RC.00 WA.050 RC.050 WA.00 RC.00 WA Rectangular Inch System Steel and croblox Accessories Individually or Sets as Stated Below Individual Accessories Steel Accessories Included Cat. No. Description Steel croblox Set AC.A Half-Round Jaw*.50 Radius RA. Straight Jaw*.50" Thick RA 4. RA 4. ** Clamps 0" -/" Capacity -/" 4" Capacity 4" 6-/" Capacity 0" " Capacity Scriber Point Center Point, 00 C/L Base Block " Thick RA 5. RA 6. RA 7. RA 8. RA. RA. RA 3. Case (CS 9.) Additional Accessories Clamps 0-8" Capacity 0-4" Capacity 0-36" Capacity Half-Round Jaws.00 Radius.00 Radius RA 9. RA 0. RA 4. RA. RA 3. * croblox jaws available as an option at extra cost. Please specify. ** Jaws are normally used in pairs, but are ordered individually. Please order accordingly. INCH INCH Square croblox Inch System Gage Block Sets in Case Accuracy Grade* Measuring Range Blocks Per Set Blocks Included In Sets Cat. No. B B B B B B in Steps of in Steps of in Steps of in Steps of in Steps of / in Steps of / in Steps of in Steps of Blocks.00 Through.009 (Steps of.000) 49 Blocks.0 Through.49 (Steps of.00) 9 Blocks.050 Through.950 (Steps of.050) 4 Blocks.000 Through (Steps of ) Same as in SC 8. Set, Plus 3 Blocks.0005,.0005, Blocks /6, 5/64, 3/3, 7/64 Block Blocks.00 Through.009 (Steps of.000) 9 Blocks.0 Through.09 (Steps of.00) 9 Blocks.0 Through.90 (Steps of.00) 5 Blocks.00 Through.500 (Steps of.00) 3 Blocks.000,.000, SC 8.A SC 8.AA SC 88.A SC 88.AA SC 36.A SC 36.AA All Square croblox sets above are available with accessories at extra cost. To order, add "X" to catalog number. Accessories are furnished in steel (see following pages). Sets include etched serial numbers and Commercial Calibration Certificate. A Master Calibration Certificate is available at extra cost. * For complete accuracy specifications, see the beginning of this section. Check out our website for interactive features at starrett.com 385

10 Gage Block Sets Inch System Individual Gage Block Sets in Case INCH Square Steel Gage Block Sets in Case B89..9 Accuracy Grade 0* Measuring Range Blocks Per Set Blocks Included In Sets Cat. No in Steps of in Steps of in Steps of in Steps of in Steps of / in Steps of / in Steps of in Steps of in Steps of in Steps of in Steps of in Steps of Blocks.00 Through.009 (Steps of.000) 49 Blocks.0 Through.49 (Steps of.00) 9 Blocks.050 Through.950 (Steps of.050) 4 Blocks.000 Through (Steps of ") Above Set also Available with Accessories** (Extra) Same as in SS 8.A Set, Plus 3 Blocks.0005,.0005, Blocks /6, 5/64, 3/3, 7/64 Above Set also Available with Accessories** (Extra) Block Blocks.00 Through.009 (Steps of.000) 9 Blocks.0 Through.09 (Steps of.00) 9 Blocks.0 Through.90 (Steps of.00) 5 Blocks.00 Through.500 (Steps of.00) 3 Blocks.000,.000 and Above Set Also Available with Accessories** (Extra) Block Blocks.00 Through.009 (Steps of.000) 9 Blocks.0 Through.09 (Steps of.00) 9 Blocks.00 Through.090 (Steps of.00) 8 Blocks 5, 6, 7, 8, 0,, 6, 0 Accessories Included: 6 Each SA 8. Studs Each SA 9. Flat Head Screws (long) Each SA 0. Flat Head Screws (short) Each SA 6. 4-/ - 6" Tie Rod (adjustable) Each SA " Tie Rod (adjustable) Each SA 8. -3/4" Tie Rod Each SA /4" Tie Rod Each SA /4" Tie Rods SS 8.A SS 88.A SS 36.A SS 8.A SS 8.AX Square Steel Gage Block Sets in Case B89..9 Accuracy Grade 00* in Steps of Same as above SS 8.AX SS 8.AAX * For complete accuracy specifications, see page at the beginning of this section. ** All square steel sets 34 through 88 are available with Accessories at extra cost. To order, add "X" to catalog number. Accessories are steel. See square block Accessories on the next page. Sets include etched serial numbers and Commercial Calibration Certificate. A Master Calibration Certificate is available at extra cost. 386

11 Gage Block Accessories SA 707. Steel Internal Measuring Machine Jaws Jaws are double-ended, self-proving, assuring parallelism and squareness. Designed for use with square style gage blocks. Jaws are made of hardened steel material,.000" long,.000" wide and.500" thick. Both side edges are lapped 90º square to the gaging faces within 30 seconds of arc and extend beyond the gage blocks in the combination, thus forming a square master. Jaw and gage combination parallelism is quickly checked merely by turning the combination to the opposite side and rechecking the reading. Furnished in pairs. Additional Accessories Description Tie Rods -3/4" Solid 5-3/4" Solid 9-3/4" Solid Cat. No. SA 8. SA 9. SA 0. Square Gage Block Accessories Steel and croblox INCH Square Steel Accessories Individually or Sets as Stated Below Individual Accessories Steel Accessories Included Set SA 5.A and 8 thru 88 Description Cat. No. Block Sets when Ordered with Accessories 34 and 36 Block Sets when Ordered with Accessories Half-Round Jaw*.5 Radius.50 Radius SA. SA. Straight Jaw*.500" Thick SA 3. Scriber Point Center Point,.00 C/L Base Block.500 Thick Knurled Screw Stud Flat Head Screw Long Short Slotted Nut Tie Rods 3/4" Solid -/" Solid -/4" Solid 3" Solid 4-/-6" Adjust 6-9" Adjust Case (CS968) SA 4. SA 5. SA 6. SA 7. SA 8. SA 9. SA 0. SA. SA. SA 3. SA 4. SA 5. SA 6. SA 7. (For SA 5.A Only) *Jaws are normally used in pairs, but are ordered individually. Please order accordingly. Check out our website for interactive features at starrett.com 387

12 Gage Blocks Individual Rectangular Gage Blocks Specify in this Sequence: Shape, Material, Size and Accuracy Grade Shape Material Size Accuracy R=Rectangular S=Square HOW TO ORDER Rectangular Block Sizes Width: all blocks are.35" wide Length: for blocks under.050", length is.5" For blocks with.050" through.90", length is.80" For blocks.00" and above, length is.380" Exceptions S=Steel C=croblox Y=Ceramic (listed in table) Example: RS.50A = Rectangular Steel block, size.50, Grade A Accuracy 8 block sets with blocks to.090" are all.5" long..050,.060,.070,.080,.090" blocks in this set are listed with the suffix "ss"..050,.00,.50" blocks contained in the 8 9-piece sets are.380" long. Specify "long length"..00" blocks contained in the 36, 38, and 43-block sets are.380" long. Specify "long length". INCH croblox, Ceramic and Steel Gage Blocks croblox Ceramic Steel A AA A AA A Grade Through.009 in Steps of Through.09 in Steps of (Wear Blocks).00 or Through.009 in Steps of Through.09 in Steps of long*.050 (Wear Blocks).050S or.050ss Through.0509 in Steps of Through.059 in Steps of or.060ss.065 (/6).070 or.070ss.0785 (5/64).080 or.080ss.090 or.090ss (3/3).00 long*.00 (Wear Blocks).00S Through.009 in Steps of Through.09 in Steps of (7/64).0 Through.9 in Steps of.00.0 Through.9 in Steps of Through.39 in Steps of Through.49 in Steps of Long* Through.90 in Steps of.00.00,.50,.300, ,.450,.500,.550, ,.700, ,.850,.900, * Order long length for Webber set replacements. 388

13 Gage Blocks Individual Square Gage Blocks Specify in this sequence: Shape, Material, Size and Accuracy Grade Shape Material Size Accuracy R=Rectangular S=Square S=Steel C=croblox (listed in table) Example: SS.5A = Square Steel block, size.5 with a Grade A accuracy HOW TO ORDER Square Block Size All square blocks are.950" x.950" Blocks have a.65" hole in the center On blocks.00" thick and over, the hole is countersunk on both faces (croblox Wear Blocks are countersunk on one face only) INCH croblox and Steel Gage Blocks croblox Steel A AA A AA Grade Through.009 in Steps of Through.09 in Steps of (/6) (5/64) (3/3) (Wear with Chamfered Hole) Through.009 in Steps of Through.49 in Steps of (7/64).50 Through.90 in Steps of ,.450,.500, ,.650,.700, ,.850,.900, Check out our website for interactive features at starrett.com 389

14 Gage Blocks Heavy-Duty Steel Gage Block Sets and Accessories GAGING AREA 7/3 X -/" These heavy-duty gage block sets are primarily used for assembling together into exclusive Webber fixtures. Precision "yardsticks" and height gages can be built up to a required dimension by wringing blocks together and then by the use of eccentric clamps, locking them into place. All blocks over " long have /4" holes that accept eccentric clamps. All blocks 6" or larger have an insulated center grip to eliminate temperature variations caused by handling. Precision scribers and dividers for tool layout can be created in a few seconds. The center point is on a.500" center line of a " block. The scriber point may be sharpened indefinitely without altering the original accuracy. HD 46.AX INCH Snap gages with inside or outside calipers can be easily assembled using accessories like the eccentric clamps, a quick-acting clamp, and a pair of half-round or straight jaws. Snap gage is used to check inside dimensions of ring gage still mounted in internal grinder Building up blocks into precision "yardsticks" Precision scribers, dividers and snap gages 390

15 Accessory Sets Indicator Accessory Set This heavy-duty accessory mounts on any build-up of heavy-duty blocks and measures the deviation of the work from nominal or desired size. (Indicator is set and checked for zero by placing blocks on any known flat surface.) HDA 0 and HDA Indicator Accessory Sets consist of a holding block, extension jaw and a precision Starrett indicator. See catalog description below for indicator ranges and graduations. Eccentric clamps are used for combining long blocks INCH Quick-acting clamps are used for combining fractional inch blocks with blocks " or longer Wear Blocks Indicator Accessory Set croblox Wear Blocks in.050" and.00" sizes are available for use with heavy-duty blocks. Heavy-Duty Steel Accessories Individually or Sets as stated below Individual Accessories Steel Accessories Included in all Description Cat. No. 4 thru 46 Piece Sets or 84 Piece Set when ordered with Accessories Half-Round Jaw*.500 Radius HDA. Scriber Point Center Point.500 C/L Eccentric Clamp Quick-Acting Clamp Base Block.500" Thick HDA. HDA 3. HDA 4. HDA 5. HDA 6. Additional Accessories Straight Jaw*.000 Thick HDA 80. Indicator Set Consisting of: Indicator Holding Block Extension Jaw (.000" Thick) HDA 0. Indicator with ±.00" Range,.0005" Graduations Case Indicator Set As Above Except: Indicator with ±.005" Range,.00005" HDA. Graduations * Jaws are normally used in pairs, but are ordered individually. Please order accordingly. (See set description next page for qty.) croblox Wear Blocks Size Cat. No..050" HDC.050 WA.00" HDC.00 WA Check out our website for interactive features at starrett.com 39

16 Gage Block Sets and Accessories Heavy-Duty Steel Gage Block Sets and Accessories B89..9 Accuracy Grade 0* Measuring Range Blocks Per Set Blocks Included In Sets Cat. No in Steps of in Steps of in Steps of in Steps of in Steps of in Steps of in Steps of in Steps of in Steps of Blocks.00 Wear croblox Block Blocks.00 Through.009 (Steps of.000) 49 Blocks.0 Through.49 (Steps of.00) 9 Blocks.050 Through.950 (Steps of.050) 4 Blocks.000 Through (Steps of ) 3 Eccentric Clamps Above Set Also Available With Additional Eccentric Clamps and Accessories** (Extra) 9 Blocks.00 Through.009 (Steps of.000) 9 Blocks.0 Through.09 (Steps of.00) 9 Blocks.0 Through.90 (Steps of.00) 9 Blocks.00 Through.900 (Steps of.00) 4 Blocks.000 Through (Steps of ) 6 Blocks Eccentric Clamps and Accessories** (Included) 9 Blocks.00 Through.009 (Steps of.000) 9 Blocks.0 Through.09 (Steps of.00) 9 Blocks.0 Through.90 (Steps of.00) 9 Blocks.00 Through.900 (Steps of.00) 4 Blocks.000 Through (Steps of ) 4 Blocks Eccentric Clamps and Accessories** (Included) 9 Blocks.00 Through.009 (Steps of.000) 9 Blocks.0 Through.09 (Steps of.00) 9 Blocks.0 Through.90 (Steps of.00) 9 Blocks.00 Through.900 (Steps of.00) 4 Blocks.000 Through (Steps of ) Blocks Eccentric Clamps and Accessories** (Included) HD 84.A HD 46.AX HD 44.AX HD 4.AX Sets include etched serial numbers and Commercial Calibration Certificate. A Master Calibration Certificate is available at extra cost. Case for HD 84.A has space for accessories and six 6.000" heavy-duty blocks. To order with accessories, add "X" to catalog number. * For complete accuracy specifications, see page at the beginning of this section. ** See previous page for accessories. Individual Heavy-Duty Gage Blocks Steel Only Block Size ,.0005,.0005, Through.009 In Steps of Through.49 In Steps of Through.90 In Steps of Through.950 In Steps of To order individual blocks, specify HD followed by size and accuracy grade. Example: HD.050 A INCH 39

17 Gage Block Sets Metric System Gage Block Sets, Individual Blocks and Accessories The following pages include these metric system items in the order shown: Rectangular gage blocks and accessories Square gage blocks and accessories RS 9.MA Mini-Metric Rectangular Steel Gage Block Set This mini-metric set of precision gage blocks calibrates micrometers, vernier gages and similar measuring tools. The gage blocks are also useful as setting masters for comparator-type dimensional gages and are useful in teaching the basics of metric measurement. The set has a capacity of 6mm in, 0.5mm or 0.5mm steps. Its nine hardened steel blocks include these sizes:,,.5,.5, 3, 5, 0, 5 and 5mm. They are finished to B89..9 Accuracy Grade 0 and are furnished in a lined metal case. Metric rectangular 88 piece and square sets are shown Metric set RS 9.MA Check out our website for interactive features at starrett.com 393

18 Gage Block Sets Rectangular croblox Gage Block Sets in Case Rectangular croblox Gage Block Sets in Case, One Millimeter Base Accuracy Grade* Measuring Range Blocks Per Set Blocks Included In Sets Cat. No. B Through 450 (Steps of.00).0 Through 450 (Steps of.0) B Through 450 (Steps of.) B Through 450 (Steps of.0005).0 Through 450 (Steps of.00).0 Through 450 (Steps of.0) B Through 450 (Steps of.) B Through 50 (Steps of.0005).0 Through 50 (Steps of.00).0 Through 50 (Steps of.0) B Through 50 (Steps of.) Blocks.00mm Through.009mm (Steps of.00) 9 Blocks.0mm Through.09mm (Steps of.0) 9 Blocks.mm Through.9mm (Steps of.) 9 Blocks mm Through 9mm (Steps of ) 9 Blocks 0mm Through 90mm (Steps of 0) Block.5 Block Blocks.00mm Through.009 (Steps of.00) 49 Blocks.0mm Through.49 (Steps of.0) 8 Blocks mm Through 9.5mm (Steps of.5) 0 Blocks 0mm Through 00mm (Steps of 0) Block.5 Block Blocks.00 Through.009 (Steps of.00) 49 Blocks.0 Through.49 (Steps of.0) 48 Blocks mm Through 4.5mm (Steps of.5) 4 Blocks 5mm Through 00mm (Steps of 5) RC 45.MA RC 45.MAA RC 88.MA RC 88.MAA RC.MA RC.MAA Sets include etched serial numbers and Commercial Calibration Certificate. Metric croblox Wear Blocks and/or Master Calibration Certificate are available at extra cost. For gage block accessories, order AC.MA Metric Accessory Set in Case. * For complete accuracy specifications, see page at the beginning of this section. METRIC Rectangular Ceramic Now there's another addition to the famous Starrett-Webber line of precision gage blocks. Ceramic, offered in rectangular, inch and metric, fills the gap between steel and the universally accepted croblox. While not as stable as croblox, ceramic is an excellent alternative to steel because of its superior hardness, thermal expansion and wear characteristics. Set RY 88.MA METRIC Gage Block Sets in Case Accuracy Grade* Measuring Range Blocks Per Set Blocks Included In Sets Cat. No. 9 blocks.00 Through.009 (Steps of.00) B Through 450 in.00 Steps 9 blocks.0 Through.09 (Steps of.0) RY 45.MA.0 Through 450 in.0 Steps 45 9 blocks. Through.9 (Steps of.) B Through 450 in. Steps 9 blocks Through 9 (Steps of ) RY 45.MAA 9 blocks 0 Through 90 (Steps of 0) B B Through 450 in.0005 Steps.0 Through 450 in.00 Steps.0 Through 450 in.0 Steps.0 Through 450 in. Steps 88 block.5 block blocks.00 Through.009 (Steps of.00) 49 blocks.0 Through.49 (Steps of.0) 8 blocks Through 9.5 (Steps of.5) 0 blocks 0 Through 00 (Steps of 0) Sets include etched serial numbers and Commercial Calibration Certificate. A Master Calibration Certificate is available at extra cost. * For complete accuracy specifications, see page at the beginning of this section. RY 88.MA RY 88.MAA 394

19 Gage Block Sets Rectangular Steel Metric System One Millimeter Base Gage Block Sets in Case B89..9 Accuracy Grade 0* Measuring Range Blocks Per Set Blocks Included In Sets Cat. No..0 Through 6.0 in.0 Steps.0 Through 6.0 in.5 Steps 4.0 Through 6.0 in.5 Steps 3.0 Through 450 in.00 Steps.0 Through 450 in.0 Steps.0 Through 450 in. Steps 3.0 Through 450 in.0005 Steps.0 Through 450 in.00 Steps.0 Through 450 in.0 Steps.0 Through 450 in. Steps 3.0 Through 50 in.0005 Steps.0 Through 50 in.00 Steps.0 Through 50 in.0 Steps.0 Through 50 in. Steps Micrometer Checking Set 9 3 blocks.0,.0,.5 4 blocks.5, 3.0, 5.0, 0.0 blocks 5.0, 5.0 RS 9.MA 9 blocks.00 Through.009 (Steps of.00) 9 blocks.0 Through.09 (Steps of.0) 45 9 blocks. Through.9 (Steps of.) RS 45.MA 9 blocks Through 9 (Steps of ) 9 blocks 0 Through 90 (Steps of 0) block.5 block blocks.00 Through.009 (Steps of.00) 49 blocks.0 Through.49 (Steps of.0) RS 88.MA 8 blocks Through 9.5 (Steps of.5) 0 blocks 0 Through 00 (Steps of 0) block.5 block blocks.00 Through.009 (Steps of.00) 49 blocks.0 Through.49 (Steps of.0) RS.MA 48 blocks Through 4.5 (Steps of.5) 4 blocks 5 Through 00 (Steps of 5) B89..9 Accuracy Grade AS* 0 0 blocks.5, 5., 7.7, 0.3,.9, 5.0, 7.6, 0.,.8, 5.0 RS 0.MA Sets include etched serial numbers and Commercial Calibration Certificate. Metric croblox Wear Blocks and/or Master Calibration Certificate are available at extra cost. For gage block accessories, order AC.MA Metric Accessory Set in Case. See rectangular metric block accessories on the next page. * For complete accuracy specifications, see page at the beginning of this section. METRIC Rectangular Gage Block Accessories Steel and croblox Rectangular croblox Wear Blocks Size Cat. No..0 RCM.0 WA.0 RCM.0 WA Rectangular Steel and croblox Accessories Individually or Sets as Stated Below Individual Accessories Steel Accessories Included Cat. No. Description Steel croblox Set AC.MA Half-Round Jaw* 5mm Radius RA 0. Straight Jaw* 5mm Thick RA 04. RA 04. ** Clamps 0-38mm Capacity 38-00mm Capacity 00-65mm Capacity 0-300mm Capacity Scriber Point Center Point, mm C/L Base Block, 5mm Thick RA 5. RA 6. RA 7. RA 8. RA. RA. RA 3. Case (CS 9.) Additional Accessories Clamps 0-450mm Capacity 0-600mm Capacity 0-900mm Capacity RA 9. RA 0. RA 4. * croblox jaws available as an option at extra cost. Please specify. ** Jaws are normally used in pairs, but are ordered individually. Please order accordingly. Check out our website for interactive features at starrett.com 395

20 Gage Block Sets Square Combination croblox and Steel Metric System Gage Block Sets in Case An ideal combination of value, price and convenience, these sets include a popular selection of croblox and steel as listed. Gage Block Sets in Case, Two Millimeter Base B89..9 Accuracy Grade 0* Measuring Range Blocks Per Set Blocks** Included in Sets Cat. No. 6.0 Through 450 in.00 Steps 4.0 Through 450 in.0 Steps.0 Through 450 in. Steps 6.0 Through 450 in.0005 Steps 4.0 Through 450 in.00 Steps.0 Through 450 in.0 Steps.0 Through 450 in. Steps 6.0 Through 50 in.0005 Steps 4.0 Through 50 in.00 Steps.0 Through 50 in.0 Steps.0 Through 50 in. Steps 6.0 Through 300 in.0005 Steps 4.0 Through 300 in.00 Steps.0 Through 300 in.0 Steps.0 Through 300 in. Steps Block.0 - Steel 9 Blocks.00 Through.009 (Steps of.00) 9 Blocks.0 Through.09 (Steps of.0) 9 Blocks. Through.9 (Steps of.mm) 9 Blocks.0 Through 9.0 (Steps of.0mm) 8 Blocks 0 Through 90 (Steps of 0mm) - Steel Blocks.5 and.0 - Steel Block Blocks.00 Through.009 (Steps of.00) 49 Blocks.0 Through.49 (Steps of.0) 8 Blocks.5 Through 0.0 (Steps of.5) 9 Blocks 0 Through 00 (Steps of 0) - Steel Blocks.5 and.0 - Steel Block Blocks.00 Through.009 (Steps of.00) 49 Blocks.0 Through.49 (Steps of.0) 8 Blocks.5 Through 0.0 (Steps of.5) 9 Blocks 0.5 Through 4.5 (Steps of.5) - Steel 4 Blocks 5m Through 00 (Steps of 5) - Steel 5 Blocks.5,.0,.5,.0, Blocks.00 Through.009 (Steps of.00) 50 Blocks.0 Through.50 (Steps of.0) 5 Blocks 3.0, 3.5, 4.0, 4.5, Blocks 0, 5, 0, 5, 30 3 Blocks 50, 75, 00 B89..9 Accuracy Grade 00* METRIC SCS 45.MA SCS 88.MA SCS.MA SC 77.MA 6.0 Through 300 in.0005 Steps 4.0 Through 300 in.00 Steps.0 Through 300 in.0 Steps.0 Through 300 in. Steps 77 Same as Above SC 77.MA SC 77.MAA Metric croblox Wear Blocks are available as option. Sets include etched serial numbers and Commercial Calibration Certificate. A Master Calibration Certificate is available at extra cost. * For complete accuracy specifications, see page at the beginning of this section. ** All blocks are croblox, except as noted. Steel SA 7. Internal Measuring Machine Jaws Double ended, self proving - assures parallelism and squareness. Designed for use with square style gage blocks, jaws are made of hardened steel 50.8mm long, 5.4mm wide and mm thick. Both side edges are lapped 90º square to the gaging faces within 30 seconds of arc and extend beyond the gage blocks in the combination, thus forming a square master. Jaw and gage combination parallelism is checked merely by turning the combination to the opposite side and rechecking the reading. Furnished in pairs. 396

21 Gage Block Sets Square Steel Metric System Gage Block Sets in Case Gage Block Sets in Case, Two Millimeter Base B89..9 Accuracy Grade 0* Measuring Range Blocks Per Set Blocks Included in Sets Cat. No. 6.0 Through 450 in.00 Steps 4.0 Through 450 in.0 Steps.0 Through 450 in. Steps 6.0 Through 300 in.0005 Steps 4.0 Through 300 in.00 Steps.0 Through 300 in.0 Steps.0 Through 300 in. Steps 6.0 Through 450 in.0005 Steps 4.0 Through 450 in.00 Steps.0 Through 450 in.0 Steps.0 Through 450 in. Steps 6.0 Through 50 in.0005 Steps 4.0 Through 50 in.00 Steps.0 Through 50 in.0 Steps.0 Through 50 in. Steps 5 to Block.0 9 Blocks.00 Through.009 (Steps of.00) 9 Blocks.0 Through.09 (Steps of.0) 9 Blocks. Through.9 (Steps of.) 9 Blocks.0 Through 0.0 (Steps of.0) 8 Blocks 0 Through 90 (Steps of 0) 5 Blocks.5,.0,.5,.0, Blocks.00 Through.009 (Steps of.00) 50 Blocks.0 Through.50 (Steps of.0) 5 Blocks 3.0, 3.5, 4.0, 4.5, Blocks 0, 5, 0, 5, 30 3 Blocks 50, 75, 00 Blocks.5,.0 Block Blocks.00 Through.009 (Steps of.00) 49 Blocks.0 Through.49 (Steps of.0) 8 Blocks.5 Through 0.0 (Steps of.5) 9 Blocks 0 Through 00 (Steps of 0) Block.5 Block Blocks.00 Through.009 (Steps of.00) 49 Blocks.0 Through.49 (Steps of.0) 48 Blocks.0 Through 4.5 (Steps of.5) 4 Blocks 5 Through 00 (Steps of 5) 8 Blocks 5, 50, 75, 00, 50, 300, 400, 500 Accessories Included: 6 Each SA 8. Studs Each SA 9. Flat Head Screws (long) Each SA 0. Flat Head Screws (short) Each SA Tie Rod (adjustable) Each SA Tie Rod (adjustable) Each SA Tie Rod Each SA Tie Rod Each SA Tie Rods SS 45.MA SS 77.MA SS 88.MA SS.MA SS 8.MAX B89..9 Accuracy Grade 00* 5 to 00 8 Same as Above SS 8.MAX SS 8.MAAX Sets include etched serial numbers and Commercial Calibration Certificate. A Master Calibration Certificate is available at extra cost. * For complete accuracy specifications, see page at the beginning of this section. METRIC Check out our website for interactive features at starrett.com 397

22 Gage Block Sets Square Steel or croblox Metric System Gage Block Accessories Square Steel Accessories Individually or Sets as Stated Below Individual Accessories Cat. No. Steel Accessories Included Half-Round Jaw** 3mm Radius 6mm Radius SA 0. SA 0. Straight Jaw** mm Thick SA 03. Scriber Point Center Point mm C/L Base Block mm Thick Knurled Screw Stud Flat Head Screw Long Short Slotted Nut Tie Rods 9mm Solid 38mm Solid 57mm Solid 76mm Solid 4-5mm Adjustable 5-8mm Adjustable SA 4. SA 05. SA 06. SA 7. SA 8. SA 9. SA 0. SA. SA. SA 3. SA 4. SA 5. SA 6. SA 7. Case (CS 968.) Additional Accessories Tie Rods 98mm 400mm 50mm SA 8. SA 9. SA 0. ** croblox jaws available as an option at extra cost. Please specify. ** Jaws are normally used in pairs, but are ordered individually. Please order accordingly. METRIC SA 5.MA Square croblox Wear Blocks Size.0mm with Side Countersunk Cat. No. SCM.0 WA 398

23 Gage Block Sets Individual Rectangular and Square Gage Blocks - Metric System croblox, CERAMIC AND STEEL Individual Rectangular Gage Blocks croblox Ceramic Steel A AA A AA A Size/Millimeters Grade , 0.4* 0.5** 0.6 Through 0.9 in. Steps*.0 or Wear Blocks.00 Through.009 in Steps of.00.0 Through.4 in Steps of.0.5 Through.49 in Steps of.0.5 Through.9 in Steps of..0.0 Wear Blocks Through 4.5 in Steps of Through 6.5 in Steps of Through 0.0 in Steps of Through 4.5 in Steps of Through 9.5 in Steps of Through 4.5 in Steps of and and Rectangular Block Sizes Width: all blocks are 9mm wide Length: For blocks 0mm thick and under, length is 30mm For blocks 0.5mm thick and above, length is 35mm Exceptions: *Blocks are 8.3mm long ** When ordering 0.5mm block, specify length (8.3 or 30mm) How To Order Specify in this sequence: Shape, Material, "M" for Metric, Size and Accuracy Grade Shape Material Size Accuracy R=Rectangular S=Square S=Steel C=croblox Y = Ceramic (listed in table) Example: RSM.0.A = Rectangular Steel block, Metric size.0, Grade A Accuracy Individual Square Gage Blocks croblox Steel A AA A Size/Millimeters Grade mm Wear Blocks with Side Countersunk.0 or Through.009 in.00 Steps.0 Through.49 in.0 Steps.5 Through.9 in. Steps 3.0 Through 0.0 in.5 Steps 0.5 Through 4.5 in.5 Steps 5mm 5.5 Through 9.5 in.5 Steps 0.0mm 0.5 Through 4.5 in.5 Steps Individual Square Gage Blocks Steel Only A AA Size/Millimeters Grade Square Block Sizes All blocks are 4.mm x 4.mm Blocks have a 6.7mm hole in the center On blocks 5.0mm thick and over, the hole is countersunk on both faces. (croblox Wear Blocks are countersunk on one face only) Check out our website for interactive features at starrett.com 399

24 Reference Bars Standard Reference Bars ", 9", 5", 37", 49"/300, 500, 650, 950, 50MM These Standard Reference Bars are invaluable for use in checking table movement of machine tools, accuracy of vernier height gages, surface plate transfer measurement, and for final inspection of precision machine tools and coordinate measuring machines. The "channel design" places additional measuring pads at appropriate points over the length of the bar as reference points for x, y or z axis measurements. Channel design permits use of the bar on its base (vertical), or on its back, or either side (horizontal). The alternating gage block jaws and spacer blocks are permanently wrung and fastened together to form " increments for inch bars and 5mm increments for metric bars. A special bushing arrangement allows the master stack to conform to thermal conditions prevailing during use, thus providing a true master even under less than perfect laboratory conditions. Mating surfaces are treated during assembly to prevent corrosion. Non-standard lengths and measuring increments are available on special order. A Certificate of Calibration is included. All models are furnished with storage case. Specifications Description Inch System Millimeter System (Stack) expressed in µin. expressed in µm Maximum:.5L + 0L in inches.005l +.5L in millimeters Minimum: Parallelism: Gage Surfaces to Base and Each Other 5µin. 0.4µm Uncertainty of Calibration 0 +.0L in inches expressed in µin L in millimeters expressed in µm. The accuracy of the surface that supports the gage must be taken into account when determining the accuracy of any measurements. With Channel Design Inch System Millimeter System Size Cat. No. EDP Size Cat. No. EDP " RBC mm RBCM " RBC mm RBCM " RBC mm RBCM " RBC mm RBCM " RBC mm RBCM Free Standing Stack Without Channel Design Vertical Position Only Inch System Millimeter System Size Cat. No. EDP Size Cat. No. EDP 8" RB mm RBM " RB mm RBM " RB mm RBM " RB mm RBM Standard Sizes are ", 9", 5", 37" and 49" in the inch system and 300mm, 500mm, 650mm, 950mm and 50mm in the millimeter system 400

25 AG 8.W Gage Block Sets Angle Gage Block Sets Angle Gage Blocks permit fast, simple and accurate measurements of any angle. They are far superior to sine bar measuring methods, that involve trigonometric formulae and complex stacks of gage blocks. Angle gage blocks come in three accuracies: croblox Reference Angle Blocks with a -second accuracy, steel Calibration Grade Angle Blocks with -second accuracy, and steel Working Grade Angle Blocks with 5-second accuracy. Each grade can be purchased in sets that will measure in steps of one-second, oneminute or one-degree to suit any need. (See angle block specification information on next two pages.) Reference Angle Blocks croblox: -second accuracy. Designed for optical or as reference standards for autocollimators, spectrometers, etc. They are unsurpassed for use in aerospace, optical, and precision instrument fields. Calibration Angle Blocks Steel: -second accuracy. The same high quality as the Reference Grade Angle Blocks. Working Angle Blocks Steel: 5-second accuracy. These angles are designed for shop or tool room. The longer gaging surfaces are made for use with an indicator. These blocks reduce set-up time and minimize error in grinding both simple and compound angles. AG 6.R Angle Gage Block Sets in Case Cat. No. AG 6.R AG 6.C AG 8.W AG.R AG.C AG 3.W AG 6.R AG 6.C AG 8.W Description/ Accuracy Grade Reference Grade ±.0 Second Calibration Grade ±.0 Seconds Working Grade ±5.0 Seconds Reference Grade ±.0 Second Calibration Grade ±.0 Seconds Working Grade ±5.0 Seconds Reference Grade ±.0 Second Calibration Grade ±.0 Seconds Working Grade ±5.0 Seconds Blocks Per Set Measuring Range Blocks Included In Sets º in Steps 6 Blocks:, 3, 5, 5, 30, 45 8* 0-99º in Steps 6 Blocks:, 3, 5, 5, 30, º in ' Steps 3* 0-99º in ' Steps º in " Steps 8* 0-99º in " Steps 6 Blocks:, 3, 5, 5, 30, 45 5 Blocks: ', 3', 5', 0', 30' 6 Blocks:, 3, 5, 5, 30, 45 5 Blocks: ', 3', 5', 0', 30' 6 Blocks:, 3, 5, 5, 30, 45 5 Blocks: ', 3', 5', 0', 30' 5 Blocks: ", 3", 5", 0", 30" 6 Blocks:, 3, 5, 5, 30, 45 5 Blocks: ', 3', 5', 0', 30' 5 Blocks: ", 3", 5", 0", 30" Cases for Angle Gage Block Sets CS 935 Calibration Set and Reference Case CS 934 Working Case * One 6" (50mm) parallel and one 6" (50mm) knife edge are included with Working Grade Sets in addition to the listed sizes. To Order Individually, Specify in the Following Key Sequence: AngleGage Prefix Numeric Size of Angle Angle Units (Degree, Min., Sec.) Accuracy Grade R, C, or W AG 45 D R Example: AG 45.DR = a Reference 45º Angle Block AG 30.MW = a Working 30' Angle Block NOTE: The catalog numbers and specifications of our angle gage blocks have been changed in response to updated requirements concerning the application of the uncertainty of measurement. See the next two pages for information regarding the specifications of our angle blocks. Check out our website for interactive features at starrett.com 40

26 Webber Gage Blocks Using Angle Gage Blocks SUPERIOR TO SINE BAR METHODS A precision angle has always been difficult to set because of the involved trigonometric formula that is used with the sine bar. The main difficulty lies in the dimension X in diagram, which often results in a figure with many decimal places. Gage blocks can only approximate this value. For example, to measure 44º 30' using a 5" sine bar the following steps are required: Sine for 44º 30' angle For dimension X multiply by Gage Blocks necessary to match this dimension = Residual error This error cannot be eliminated in sine bar procedure With angle gage blocks, you take a 45º block from the set, wring on a 30' block so that the plus end of 45º block contacts the minus end of 30' block, and you have an angle of 44º 30'. It is not only easy to accomplish, it is absolutely accurate. A Ease and Versatility A set consisting of only 6 blocks will measure 356,400 angles in steps of one second, to an accuracy of /5,000,000th of a circle! These micro-accurate blocks can be used in either plus or minus positions. In example "A", take the 30º angle and add the 5º angle to obtain a measurement of 35º (making sure that both plus ends are together). In "B", use the same two blocks but wring them together so that the minus end of the 5º block is over the plus end of the 30º block. This will subtract 5º from 30º, thus giving a 5º measurement. Indexing a Large Rotary Table A Webber Angle Block or True Square is positioned on the work and a beam of light from an autocollimator is directed against the gaging surface. This becomes 0º, or the reference surface. Other angle blocks are then added in proper combination to measure each succeeding angle. The table is rotated and inspected at each position with reference to the light beam. This method indexes large workplaces quickly, with accuracy measured in fractional seconds. Angle Gage Block Specifications Accuracy In Microinches (Microns) Material Reference Grade croblox Calibration Grade Steel Working Grade Steel s: Deviation From Nominal ±.0 second ±.0 second ±5.0 second Flatness of Gaging Surfaces 6µin. (0.5µm) 8µin. (0.0µm) 4µin. (0.35µm)** Flatness & Parallelism of Sides 8µin. (0.0µm) 8µin. (0.0µm) 6µin. (0.40µm)** Squareness of Sides to Gaging Surfaces 6 seconds 8 seconds seconds Area of Gaging Surfaces " x " (5 x 50mm) " x " (5 x 50mm) 5/8" x 4" (6 x 00mm) Surface Finish (Gage Surfaces Only) 0.4µin. AA (.0µm AA) 0.6µin. AA (.05µm AA).0µin. AA (.05µm AA) Estimated Uncertainty of Measurement (k=) 0.6 seconds.0 seconds 3.5 seconds Flatness tolerances exclude.5mm from the edges on all angle blocks, except where marked with **. Then 3mm from the edge is excluded. Dimension of gaging surfaces in millimeters is approximate. B Inspecting a Simple Angle The photo above shows a workpiece on which an angle of 30º is required. The workpiece is resting on a parallel* which is wrung to angle blocks forming 30º. The entire set-up is lined up vertically with an angle plate and then indicated across the top of the work to determine the correctness of the angle. * Parallels are not necessary, but they are convenient because of their longer reference surface. Setting a Revolving Magnetic Chuck A chuck is set for a 38º angle. Three blocks, +30º, +5º and +3º, are assembled and mounted with the parallel*. The indicator quickly tells if the setting is accurate. Adjustment is a matter of seconds. A revolving chuck teams up perfectly with angle blocks to make possible several applications in tool grinding that are more difficult with other methods. 40

27 Webber Gage Blocks True Squares True squares are designed for fast, precision indexing with angle gage blocks. All faces of Webber True Squares are at precisely 90º to adjacent sides, with perfect optical flatness and parallelism to permit use with autocollimators. Applications for fast precision indexing and setting of angular grinding fixtures are almost unlimited. For example: the work and the true square are mounted together on a revolving fixture. A notch is ground by two successive cuts, one at 90º with the true square, and the other at º with the addition of two angle blocks (+3º and º) mounted on square. An indicator reading is taken before each grind. This process is then repeated by turning the True Square to successive zero readings. True Squares are designed for use as an accessory to our angle gage blocks to easily make angles greater than 45 and through 80. Webber True Squares also permit a fast, easy check of indexing tables. The gaging faces are at precise 90 angles with optical flatness and finishes that permit the use of autocollimators. The catalog numbers and specifications of our True Squares have been changed in response to updated requirements concerning the application of the uncertainty of measurement. True Square Specifications Cat. No. TS.R TS.C TS 44.W TS 66.W Grade Reference Calibration Working Working Material croblox Steel Steel Steel s: Deviation From Nominal ±.0 second ±.0 second ±5.0 second ±5.0 second Flatness of Gaging Surfaces 6µin. (0.5µm) 8µin. (0.0µm) 4µin. (0.35µm)* 4µin. (0.35µm)* Flatness & Parallelism of Sides 8µin. (0.0µm) 8µin. (0.0µm) 6µin. (0.40µm)* 6µin. 0.40µm)* Squareness of Sides to Gaging Surfaces 6 seconds 8 seconds seconds seconds Area of Gaging Surfaces " x " (5 x 50mm) " x " (5 x 50mm) 5/8" x 4" (6 x 00mm) 5/8" x 6" (6 x 50mm) Surface Finish (Gage Surfaces Only) 0.4µin. AA (0.0µm AA) 0.6µin. AA (.05µm AA).0µin. AA (.05µm AA).0µin. AA (.05µm AA) Estimated Uncertainty of Measurement (K=) 0.6 seconds.0 seconds 3.5 seconds 4.0 seconds Flatness tolerances exclude.5mm from the edges on all angle blocks except where marked with *. Then, 3mm from the edge is excluded. Dimension of gaging surfaces in millimeters is approximate. Check out our website for interactive features at starrett.com 403

28 croblox croblox Reflecting Cubes Stable and maintenance free, reflecting cubes are ideal for 90º indexing or alignment in optical tooling or inspection. To order, specify the following information:. The number and position of all finished sides, including the base: NOTE: for fixturing purposes during manufacturing, the bottom face must be one of the finished sides. The bottom face is etched with the Webber logo, a serial number, and face identifications as applicable.. Specify the manufacturing tolerances of the 90 angles, second, 3 seconds, or other angular specification. 3. A certificate of calibration showing the deviation from 90 of the finished sides is available at extra cost. NOTE: Our uncertainty of measurement is estimated to be ±.0 seconds. This uncertainty should be added to the manufacturing tolerance to give practical tolerance of the cube. 4. If requested, a copy of the material certificate from our supplier of chrome-carbide is available at no extra cost. To Order Webber Optical Cubes Specify all 6 parts to the part number Prefix Size Face Code Hole Pattern Hole Type Accuracy CUBE A thru K (See Face Table) *Not Available In 0.50" Size 4 Top (blank) or thru 4 (See Hole Pattern Chart) 3 Base (blank) or S=Fine Thrd T=Coarse Thrd U=Thru Hole V=Thru Hole with C-Sink Y=C'Bore thru hole (See Hole Pattern Chart for available dimensions) Face Code Table Face Code Example: CUBE.0 A 3SEC CUBE.0 = " Cube A = finished 6 sides SEC = orthogonal to 3 second accuracy. (No holes were specified in this example.) No. of Finished Faces SEC* 3 SEC* 5 SEC 0 SEC Finished Faces A 6 ALL B Base C Top-Base D Base E 4-3-Top-Base F 4 --Top-Base G 3-3-Base H 3 --Base J 3 -Top-Base K -Base Cubes are made to order from semifinished blanks in six standard sizes: 0.50" (.7mm), 0.75" (9.0mm), 0.95" (4.mm),.00" (5.4mm),.50" (38.mm), and.00" (50.8mm). Also available is a.950" (4.m) square with a 7/64" (6.7mm) countersunk center hole. Reflectivity of finished faces is nominally: Visible Blue Light ( = 400 Â) 50% Visible Red Light ( = 6900 Â) 60% Infrared ( = 0.6 μm) > 80% We are unable to measure or certify reflectivity. If reflectivity testing is required,the user must arrange for testing through a third party. 404

29 Hole Pattern Dimensions and Hole Types Dimensions are shown in Inches. Hole Pattern- Hole Pattern- Hole Pattern-3 Hole Pattern-4 Min. Good Thread.8 T S T S U0 U U U3 V0 V C'Bore Depth =.0" Y0 Y Y CUBE.50 CUBE.75 CUBE.95 Min. Good Thread.40 T S T S U U U3 U4 V V V3 V4 C'Bore Depth =.38" Y Y Y3.66 Dia. Thru Hole 7 C-Sink. Min. 00" Deep for #8 Flat Head Screw Min. Good Thread.40 T S T S U U U3 C'Bore Depth =.38" Y CUBE.0 Min. Good Thread.50 T S T3 S3 T4 S4 U U3 U4 V V3 V4 C'Bore Depth =.50" Y Y3 Y Min. Good Thread.50 T S T3 S3 U U3 U4 C'Bore Depth =.50" Y BCD Min. Good Thread.50 T S T3 S3 U U3 U4 C'Bore Depth =.50" Y Min. Good Thread.50 T S T3 S3 U U3 U4 C'Bore Depth =.50" Y CUBE.5 Min. Good Thread.6 T3 S3 T4 S4 U3 U4 U5 V3 V4 V5 C'Bore Depth =.75" Y3 Y4 Y Min. Good Thread.6 T3 S3 T4 S4 U3 U4 U5 V3 V4 C'Bore Depth =.75" Y3 Y BCD Min. Good Thread.6 T3 S3 T4 S4 U3 U4 U5 V3 V4 C'Bore Depth =.75" Y3 Y Min. Good Thread.6 T3 S3 T4 S4 U3 U4 U5 V3 V4 C'Bore Depth =.75" Y3 Y4 CUBE.0 Min. Good Thread.75 T3 S3 T4 S4 U4 U5 U6 V3 V4 V5 C'Bore Depth =.5" Y4 Y5 Min. Good Thread.75 T3 S3 T4 S4 U4 U5 U6 V3 V4 V5 C'Bore Depth =.5" Y4 Y BCD Min. Good Thread.75 T3 T4 S3 S4 U4 U5 U V3 V4 V5 C'Bore Depth =.5" Y4 Y5 Min. Good Thread.75 T3 S3 T4 S4 U4 U5 U6 V3 V4 V5 C'Bore Depth =.5" Y4 Y5 Legend for Hole Types Threaded Hole Thru Hole 7 Countersunk Hole Counterbore Hole for Cap Head Screw T = 6-3 S = 6-40 U0 = 0.8 Dia. for #4 Screw V0 = 0.8 Dia. for #4 Screw Y0 = for #4 Screw 0.8 Dia. Thru Hole 0. Dia. C'Bore T = 8-3 S = 8-36 U = 0.56 Dia. for #6 Screw V = 0.56 Dia. for #6 Screw Y = for #6 Screw 0.80 Dia. Thru Hole 0.9 Dia. C'Bore T3 = 0-4 S3 = 0-3 U = 0.80 Dia. for #8 Screw V = 0.80 Dia. for #8 Screw Y = for #8 Screw 0.80 Dia. Thru Hole 0.9 Dia. C'Bore T4 = /4-0 S4 = /4-8 U3 = 0.06 Dia. for #0 Screw V3 = 0.06 Dia. for #0 Screw Y3 = for #0 Screw 0.06 Dia. Thru Hole 0.34 Dia. C'Bore U4 = 0.66 Dia. for /4" Screw V4 = 0.66 Dia. for /4" Screw Y4 = for /4" Screw 0.66 Dia. Thru Hole 0.40 Dia. C'Bore U5 = 0.38 Dia. for 5/6" Screw V5 = 0.38 Dia. for 5/6" Screw Y5 = for 5/6" Screw 0.33 Dia. Thru Hole 0.50 Dia. C'Bore U6 = 0.39 Dia. for 3/8" Screw s are ±.00" except for Counterbore depth: ±.00" Example: CUBE.5 D Y4 SEC CUBE.5 = -/" Cube D = finished front, right, and base = two holes located in corners of the cube (See Pattern Table for hole location) Y4 =.66 Dia. thru hole with.40 Dia C'Bore for /4' cap screw For.5" cube, C'Bore depth =.75" (See Pattern Table) SEC = finished sides orthogonal to second accuracy Check out our website for interactive features at starrett.com 405

30 Optical Optical Polygons Webber Optical Polygons provide an easy, accurate method of checking and calibrating angles. They are designed for use with autocollimators in measuring angle spacing. The exclusive one-piece design provides compact, fixed master for precise angle spacing. Target faces are highly reflective and optically flat. Chrome carbide polygons provide a hardness of Rockwell 7-73 C and a corrosion resistance 0-0 times that of 8-8 stainless steel, resulting in lifetime accuracy. Maintenance problems are virtually eliminated due to their ruggedness and extreme stability. A " mounting hole, flanged bushing, lapped washer and hold-down bolt, furnished with each unit, permit mounting the polygon in any desired attitude. Available in two accuracy grades. Furnished in case. Certificate of Calibration included. To order polygons, specify number in the following key/sequence: Optical Polygon OP No./Faces Decimal Accuracy Grade Example: OP 3.0 = A 3-sided optical polygon with a 0 Reference Accuracy Optical Polygon Specifications No. of Sides Angle Spacing Degrees Target Diameter Across Corners Height Size Area Area Inch (mm) Inch (mm) Inch (mm) Sq. In. Sq. Cm..90" (73.6mm).880" (.3mm).75" x.75" (9 x 9mm) Optical Polygon Specifications Accuracy Grade Target Area Flatness* Accuracy of Calibration (Uncertainty) Maximum Deviation of Faces from Nominal 3- Reference: 0 4 µin. ±.0 sec. ±.0 sec. Calibration: (.0 µm) ±.0 sec. * Excludes.00" (0.5mm) from edges. All sizes: Flatness and parallelism top and bottom.00005"; maximum pyramidal error ±5 seconds. 406

31 Optical Fused Quartz Optical Flats For visually checking the flatness of seals, gages and mating surfaces. Through means of interpreting light interference patterns or bands, the optical flat provides a simple, accurate precision method for measuring surface flatness. Flats are crafted from high quality fused quartz and provide the maximum resistance to wear, damage and temperature variations. Starrett-Webber optical flats are available in single or double surfaces and three accuracy grades. The double flat has both surfaces finished to tolerance but not necessarily parallel. Double flats provide longer service because wear is distributed over two surfaces. All are furnished with case. Coating is available and it aids readability when applied to one surface. Coating is of value on single-sided flats only. Coating on a double surface will reduce the readability of the other surface. When ordering, specify size, accuracy grade, single or double side, and coated or not. Fused Quartz Optical Flats, Accuracy Grades Reference Grade µin. (.03 µm) Master Grade µin. (.05 µm) Working Grade 4 µin. (.0 µm) Fused Quartz Optical Flats, Standard Sizes* " x /" (5 x.7mm) " x 5/8" (50 x 6mm) 3" x /6" (75 x 7.5mm) 4" x 3/4" (00 x 9mm) 5" x 7/8" (5 x mm) 6" x " (50 x 5mm) * Dimensions shown in millimeters are approximate. Larger sizes available on special order. Optical flats are made to U.S. Federal Specifications GG-O-635. Certificate of Calibration available at extra cost. Accuracy of Calibration (uncertainty) 3µin. (0.08µm). Check out our website for interactive features at starrett.com 407

32 Chamois These Starrett-Webber synthetic chamois cloths, rather than natural chamois, are recommended for wiping gage surfaces. They can be used with solvents and oils, including Starrett M- All-Purpose Lubricant, and are washable in detergents. Chamois Description Cat. No. Dry CH. Lubricated CH. Gage Block Stones If a block does not wring together with other blocks, it may be the result of nicks or other damage. Examine blocks carefully with a magnifying glass. If a small burr is found, it may be removed with a gage block stone. Starrett-Webber stones, when used moderately, may be rubbed directly on the gaging surfaces without danger of decreasing the size of the gage block. Available in 3 styles/materials as listed. GS 3 is recommended for use with steel gage blocks SAO 3 is recommended for general use. Steel, ceramic, or carbide blocks SAO 3 is recommended for use with carbide and ceramic gage blocks Gage Block Stones For Block Material Description Black Granite Stone, Steel /4 x x 3" (6.3 x 5 x 75mm) Sintered Aluminum Oxide, 5/6 x x 3" (8 x 5 x 75mm) Steel or Carbide Serrated Aluminum Oxide with Case, x x 3" (5 x 50 x 75mm) Cat. No. GS 3. SAO 3. SAO